If you are interested in becoming a locally designated property, you will need to start with the Union County Historic Preservation Commission which is located in the Heritage Room at the Historic Courthouse (300 N. Main St.): http://unioncountync.gov/government/boards-and-committees/historic-preservation-commission

Tree Inventory- Conducted in 2001

National Register of Historic Places - Completed in 1987. This document contains information pertaining to the strucutres within the boundary of the National Historic District. The Local Historic District encompasses many of the same structures. 

The National Park Service publishes preservation briefs to provide guidance on preserving, rehabilitating, and restoring historic buildings. To access the preservation briefs, please follow this link: https://www.nps.gov/tps/how-to-preserve/briefs.htm

The State Historic Preservation Office offers a multitude of resources for property owners of historic properties including statewide surveys, nominations of eligible properties to the National Register of Historic Places, environmental review of state and federal actions affecting historic and archaeological properties, technical assistance to owners int he restoration of historic properties, grant assistance for historic preservation projects, technical assistance to local preservation commisions, and historic preservation education. https://www.hpo.nc.gov/

The State Historic Preservation Office also provides assisantance with coordinating historic preservation tax credits for reabhilitations of historic buildings: https://www.ncdcr.gov/about/history/division-historical-resources/state-historic-preservation-office/restoration-6

The Window Preservation Alliance was formed in response to requests to have window restorers exhibit at regional and national building and historic preservation events. Their goal is to connect property owners who wish to save their windows with professional who can provide the assistance needed. Their page has has a directory page with company's who can provide assistance with preserving historic windows. Please note that these are not recommendations but simply guidance to help you get started: https://windowpreservationalliance.org/

Preservation North Carolina promotes and protects the buildings and lanscapes of our state's diverse heritage. Preservation NC acquires endangered historic properties and then find purchasers willing and able to rehabilitate them. https://www.presnc.org/property-listing/

The National Trust for Historic Preservation goal is to save places where our history has happened. They are a privately funded nonprofit organization that works to save buidlings and revitalize downtowns. https://savingplaces.org/

Asbestos Resources Homes built before the 1980s could expose homeowners, their families and others to asbestos possibly hiding in cement, floor tiles, insulation, walls and pipes. Our Guide to Asbestos in the Home can help protect you and others from exposure.
https://www.asbestos.com/exposure/home/
https://www.asbestos.com/abatement-guide/